Beware of Derbyshire horseradish. A gravestone in St. Anne's churchyard, Buxton, reads

THIS Stone is placed here
IN memory of
JOHN KANE, Comedian
who departed this life December
the l0th 1799, Aged 58 years.

He apparently gathered what he thought was wild horseradish root, and ate it with (what else?) roast beef. It was in fact hemlock, and it killed him.